Improvement in insertible saw-teeth



E. C.- KEYS. INSERTABALE SAW-TEETH.

No.180,4-Z9. I Patenned-Aug.1,'1876.

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33 1 fi/a a UNITED STATES PATENT FFIG.

EZRA C. KEYS, OF ALLEGHENY, ASSIGN OR TO HUGH LEE AND DANIEL HOFFMAN, OFPITTSBURG, PENNSYLVANIA, AND WILLIAM KEYS, OF

LAWEENoE, KANSAS.

IMPROVEMENT IN INSERTIBLE SAW-TEETH.

Specification forming part of Letters Patent N 0. 180. 129, dated August1, 1876; application filed June 19,1876.

To all whom it may concern:

Be it known that 1, EZRA O. KEYS, of Allegheny, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Saws; andI do hereby declare that the following is a fulland ex act description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

My invention relates to an improvement in insertible saw-teeth; andconsists in furnishing the blade with detachable teeth, having recessesor openings in them for the purpose of giving them flexibility withrelation to their bearings, and for more perfectly and securelyembedding and impinging upon the detachable cutting-points.

To enable others skilled in the art to make and use my invention, I willproceed to de scribe its construction and operation.

In the drawings, Figure 1 is a side view of a portion of a saw-bladefurnished with my improved saw-tooth. Fig. 2 is a transverse section atline 3 of Fig. 1.

A is the saw-blade, provided with an aperture, n, in which isinsertedthe detachable tooth B, which tapers from the heel to ward the point,the edges of which are circular, and the edges of the recesshavingcorresponding grooves, corresponding to the circled edges of thetooth. The tooth B is furnished with openings 0 c and D. The tooth, atc, is furnished with copper or other soft metal, brazed to the tooth forthe purpose of embedding the carbon point f, which is placed betweenthe-surfaces of the soft metal, as indicated in Fig. 1. The tooth beinginserted in the saw-blade, as indicated in Fig. 1, the wedge g is forceddown by any suitable means for the purpose of moving the tooth forward,thereby causing'the forward end of the tooth to impinge firmly on thepoint f, and in case the tooth moves too far forward it may be spread atits heel by driving wedges in the openings 0 c. If the cutting-pointshould become worn it can readily be removed by loosening the wedge ganddrawing back the tooth B, which will spread at its point, so as torelease its grasp on the point j, which may be dressed and adjusted atthe will of the operator.

Having thus described my improvement what I claim as my invention is Asaw-tooth constructed and secured in the saw-blade, substantially asherein described.

EZRA O. KEYS.

WVitnesses:

A. O. JOHNSTON, B. L. JOHNSTON.

